USB to serial cable adapters
Many court reporters are still using serial cables to run realtime feeds to attorney laptops in court. Since few laptops manufactured in recent years will have a serial port, an adapter will be needed.
However, as I noticed recently during the setup of audio visual equipment for a trial in New York state court, these adapters will not 'plug and play'. You'll need to have the correct drivers which may not be easy to locate online, particularly if you are stuck with an adapter unmarked with any brand name or model number.
Bring your own adapters and hold onto the disc with the drivers! This technological anachronism may not be manufactured by a company that posts them on the web!